Ratchet swivel drilling-rope socket.



PATENTED FEB. 21, 1905. J. & P. R. KUNNY & H. G. ARUNDELL. RATGHET SWIVEL DRILLING ROPE SOCKET.

APPLICATION FILED SEPT.6, 1904.

- ATTORNEYS.

UNITED STATES Patented February 21, 190 5.

PATENT OFFICE.

JOHN KUNNY, PETER R. KUNNY, AND HENRY G. ARUNDELL, OF LOS ANGELES, CALIFORNIA.

RATCHET SWIVEL DRILLING-ROPE SOCKET.

SPECIFICATION forming part of Letters Patent No. 782,969, dated February 21, 1905.

Application filed $eptember 6, 1904. Serial No. 223,556.

To all wh/mt it natty concern.-

Be it known that we, JOHN KUNNY, PETER R. KUNNY, and HENRY G. ARUNDELL, citi- Zens of the United States, residing at Los Angeles, in the county of Los Angeles and State of California, have invented new and useful Improvements in Ratchet Swivel Drilling- Rope Sockets,of which the following is a specification.

The object of our invention is to improve and render reliable the ratchet mechanism in the ball-bearing swivels used in drilling-tools, which prevents the tool from turning in one direction, but allows it to turn freely in the other direction. We accomplish these objects by means of the device described herein and shown in the accompanying drawings, in which Figure 1 is a central longitudinal section with parts in elevation of our improved ratchet swivel rope-socket. Fig. 2 is an enlarged detail of the ring carrying upon the inside thereof ratchet-teeth. Fig. 3 is a detail view of the mandrel which carries the dog. Fig. 4 is a cross-section taken on line 4 4 of Fig. 1 looking in the direction indicated by the arrow-heads thereon.

This invention is an improvement on our ratchet clutch drilling swivel covered by United States Letters Patent No. 742,332, of date October 17 1903; and it consists in providing a pin to hold the dog and the spring used in the ratchet mechanism.

In the drawings, A represents the stock of the rope-socket upon which the other parts are assembled. This stock has a taper screwthreaded socket B in its bottom end, adapted for engagement with the screw-threaded end of the drilling-tool commonly used. The upper portion of this stock A is reduced in size and is externally threaded for engagement with the cylindrical cap O and fits onto the stock A. The cap O has a central longitudinal bore D throughout its entire length, and this bore is enlarged at the bottom end, forming the shoulder D, against which the balls E bear. Into this central longitudinal bore is rotatably fitted the sleeve F, on the inside of which the drilling-rope is secured in the ordinary manner. The upper portion F of the sleeve F fits into the upper portion of the longitudinal bore D in the cap (1. The lower portion F is enlarged and fits into the enlarged portion of the central bore I) in the cap. The halls E of the ball-bearing swiveljoint run between the shoulder D above and the enlarged portion F of the sleeve F be' low. Below the enlarged portion F of the sleeve F and integral therewith is a screwthreaded portion F. An internally-threaded ring G fits in its upper end onto the threaded portion F of the sleeve F. The ring G has a working fit in the enlarged portion of the central bore in the cap. In the lower portion, below the threads in the ring G, are out the ratchet-teeth G. The length of the ring G, together with that of the portion F" of the sleeve F, and the diameter of the balls of the ball-bearing are such that they all lit snugly into the enlarged portion of the central bore D in the cap O between the shoulder D and. the top of the stock A, which, as above said, is screwed into the bottom part of the cap O. The upper portion of the stock A is bored out and threaded to receive the screwthreaded shank H of the mandrel H. This mandrel when the rope-socket is assembled projects upwardly into the lower portion of the ring G. On the lateral surface of the mandrel H are out three longitudinal sockets I, which are of the shape shown in Figs. 3 and 4c. These recesses carry the dogs J, which snugly fit thereinto and are of the shape shown in Figs. 3 and 4. The dogs J have a hole K bored transversely therethrough and into which the pin L is adapted to loosely fit. These pins have a tight fit in holes bored in the mandrel. The holding-pins L project into the holes K when the dogs J are in their proper position,as shown especially in Fig. 4. Around the pins L and back of the dogs J are the spiral springs M, which serve to crowd the dog J out against the ratchet-teeth G of the ring G.

It will be seen that the insertion in the dogs of the pins L, together with the other parts, provides a simple and eflicient ratchet device, in the operation of which there are no wearingsurfaces which when worn too much would allow the dogs J to fall out of their l normal positions, and thereby impair the efficiency of the rope-socket, and the gist of our invention consists in providing and placing these holding-pins, changing the configuration of the socket I, into which these pins lit, and changing the configuration of the dogs for proper placement in the sockets, as shown.

Having described our invention, what we claim as new, and desire to secure by Letters Patent, is

1. In a ratchet-clutch for drilling-swivels provided with ratchet mechanism, the hereindescribed mandrel H having longitudinal sockets 1 therein for the reception of a dog and also having a hole therein for the reception of the inner end of a holding-pin; a dog for placement in said sockets having an aperture therethrough for the reception of a holding-pin, in combination with a spring adapted to be placed on the holding-pin between the dog, and the mandrel, and a holding-pin in the hole in the socket and in the hole in the dog.

2. The herein-described ratchet mechanism comprising a mandrel having sockets for the reception and operation of clutch-engaging dogs, clutch-engaging dogs in said sockets in said mandrel in combination with a holdingpin having a working fit in the dog and projecting into a socket in the mandrel and a spiral spring encircling said pin and interposed between the mandrel and the dog.

3. The herein-described ratchet mechanism for use in ratchet swivel drilling-sockets comprising a mandrel having longitudinal sockets in the periphery thereof for the reception of ratchet-dogs, dogs in said socket and having holes therein for the reception of a holdingpin; a holding-pin in said recesses and projecting therefrom into a socket in the mandrel and a spiral spring encircling said pin and disposed between the dog and the mandrel.

4. In a ratchet swivel drilling mechanism the herein-described mandrel H having longitudinal sockets I in the periphery thereof for the reception and operation of clutch-engaging dogs J, the said mandrel being provided with a socket therein for the reception of the inner end of a holding-pin; a dog J in said socket I having an aperture K therethrough for the reception of a holding-pin; a holdingpin extending through the aperture K in the dog and extending into the socket in the mandrel; a spiral spring encircling the pin L and interposed between the dog and the mandrel.

In witness that we claim the foregoing we have hereunto subscribed our names this-29th day of August, 1904.

JOHN KUNNY. PETER R. KUN NY. HENRY Gr. ARUNDELL. \Vitncsses:

HENRYT. HAZARD, G. E. HARPHAM. 

